Not on Jewish, Muslim, Hindu (etc.) vampires!
Don't think it'll work on mormon vampires either.
No, they have magic underwear. It wards off demons.
I prefer garlic, myself!
I'll take garlic over vampires any day, myself!
Does the cross double as a dagger, just in case he vampire closes in, and you have to stab him?
In Texas I had a very large bunch of garlic hanging above the kitchen stove. My daughters asked what that was for. I said "vampires," and they laughed and said "ah, dad." Then I said it must be working because I never see any vampires around.